the standoff over the fiscal cliff. kwame holman updates the state of the negotiations and we talk with tennessee republican senator bob corker. >> ifill: jeffrey brown examines new concerns over syria's chemical weapons capability and what, if anything, the u.s. can do about it. >> woodruff: from florida, hari sreenivasan has the story of endangered coral reefs. many of them dying because ocean temperatures are rising and the waters are more acidic. >> i remember seeing fields of elk horn coral that you couldn't see through it and you couldn't see beyond it and those same areas are dead you know 99% dead. ♪ >> ifill: and we close with a remembrance of jazz great dave brubeck who died today, one day shy of his 92nd birthday. >> woodruff: that's all ahead on tonight's newshour. major funding for the pbs newshour has been provided by: and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting. and by contributions to your pbs stati